CVE-2021-26376 Denial of service in Athlon™ Series

What is CVE-2021-26376?

CVE-2021-26376 is a medium-severity denial of service vulnerability in Amd Epyc 7232p Firmware, published on 11 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Insufficient checks in System Management Unit (SMU) FeatureConfig may result in reenabling features potentially resulting in denial of resources and/or denial of service.

Which versions are affected by CVE-2021-26376?

It affects 83 products.

Products include Amd Epyc 7232p Firmware, Amd Epyc 7252 Firmware, Amd Epyc 7262 Firmware, Amd Epyc 7272 Firmware, Amd Epyc 7282 Firmware, Amd Epyc 72f3 Firmware and 77 more.

How do I fix CVE-2021-26376?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-26376 being exploited?

There is no known exploitation of CVE-2021-26376 in the wild and no public exploit code.

Other vulnerabilities in Amd Epyc 7232p Firmware

• CVE-2021-26379 Memory corruption in 2nd Gen AMD EPYC™ Critical 9.8
• CVE-2023-20520 Memory corruption in 1st Gen AMD EPYC™ Critical 9.8
• CVE-2021-46756 Denial of service in 1st Gen AMD EPYC™ Processors Critical 9.1
• CVE-2021-46769 Other in 2nd Gen AMD EPYC™ High 8.8
• CVE-2020-12944 Memory corruption in Athlon™ Series High 7.8

All Amd Epyc 7232p Firmware vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-vg73-hfwm-24qf.